Profile page problem with WPML

I’m having the following problem:

1. I’ve installe WPML and configured it to have main language (english) as “normal” link and secondary language (italian) as pretty link. So the link to https://www.mysite.com/reserved-area becomes https://www.mysite.com/it/area-riservata in italian
2. Ultimate membership is installed, active and configured as per needs to show the username in the URL (it would be better to add nothing to the URL but it’s not an option in your plugin)
3. When the user is logged-in and visit the page https://www.mysite.com/reserved-area the page is correctly shown and the URL becomes https://www.mysite.com/reserved-area/membername/.
4. When the italian flag is clicked and the https://www.mysite.com/it/area-riservata is to be loaded than a 302 redirect is done to home page. Please note that /membername/ is not added at the end of the URL
5. If I manually add /membername/ at the end of the url and try to visit https://www.mysite.com/it/area-riservata/membername/ it resolve in 404

If I disable UM everything works as expected. How to solve this problem?